Nowadays, there are some small products that are ignored by us, ranging from glasses to airplanes. Behind these machinery and the great dreams of mankind, they cannot do without the small things-screws. And a good screw cannot be separated from a good processing method, such as small precision screws as small as 1.0 used on precision instruments, large and long extra-long screws used on wind equipment or even airplanes. So, what are the production processes of precision small screws?

Precision small screws generally need to be electroplated. We know that these electronic precision screws are very small. It is also difficult to electroplating! If the number is small, the electroplating factory may also mix precision screws of different specifications for electroplating, which makes some places unable to be electroplated. It is easy to cause the product to be scrapped. We must clean the precision screws before electroplating, and the cooperating electroplating factory can perfectly electroplate the precision screws.



Precision small screws should not be matched with rigidity during electroplating, which will affect the quality of screw products:

1. It is difficult to meet the quality requirements of various aspects of electroplating of different screws under the process conditions of conventional electroplating.

2. The specifications of the hardware screws are too close, the size and length seem to be the same. Large and external hexagonal bolts have to be plated separately. Otherwise, when the plating is good, it's not easy to divide, and the selection is not good.

3. Heavier screws and lighter screws, and smaller screws and larger screws must be plated separately. Otherwise, the two may be encountered during the electroplating process, resulting in damage to the screws.

Fourth, the screws are easy to be stuck together, and the two should be separated for electroplating. Otherwise, the screws of two different specifications and models will get stuck together and form a ball during electroplating. Easily lead to failure of electroplating. Even after plating, it is difficult for us to separate these two types of screws.

Thread cutting: generally refers to the method of machining threads on a workpiece with a shaped tool or abrasive tool, mainly including turning, milling, tapping, threading, grinding, grinding and whirlwind cutting. When turning, milling and grinding threads, the transmission chain of the machine tool ensures that the turning tool, milling cutter or grinding wheel moves along the axis of the workpiece accurately and uniformly for each revolution of the workpiece. When tapping or threading, the tool (tap or die) rotates relative to the workpiece, and the first formed thread groove guides the tool (or workpiece) to move axially.

Thread rolling: The processing method of plastically deforming the workpiece to obtain the thread with a forming rolling die is also commonly referred to in the industry as cold heading. The machines used in this production method are generally single-die machines, multi-station machines, and Screws produced by this method are faster in production speed and lower in cost. However, compared with the cutting process, the head and tail of the screw produced by this process are naturally formed, and the appearance is relatively round. It is not as sharp as the cutting process, and the appearance is beautiful.

Each method has the benefits of each method. Although the cutting process is not as fast as cold heading, its accuracy is higher than that of cold heading. The cold heading process produces more and faster in quantity and speed, and lower cost, especially for the production of precision small screws. At that time, the cold heading process is more cost-effective than the turning process.